John Talberth, Erin Gray, Logan Yonavjak, Todd Gartner, Green versus Gray: Nature’s Solutions to Infrastructure Demands, The Solutions Journal, Volume 4, Issue 1, January 2013, Pages 40-47 ( Abstract: For almost a century, New York City has drawn its drinking water from the Catskill Mountains, more than 100 miles to the north. In April of 2007, the Environmental Protection Agency (EPA) announced the results of a several-year review of the city’s ongoing program to maintain clean drinking water supplies with forest and open space conservation in the Catskills rather than the construction of filtration plants. The results were encouraging. The EPA concluded that as long as the city agreed to set aside $300 million over the next 10 years to acquire land and restrain upstate development that causes runoff and pollution, the agency would exempt New York from having to build an $8 billion filtration plant.1 The Catskills aqueduct has been held up as the quintessential example of green infrastructure trumping gray and has prompted cities worldwide to consider alternative solutions to the infrastructure demands of the twenty-first century. Green infrastructure is increasingly … Topics: Economy; Ecosystem Services; Environment